类类forName()方法 (Class class forName() method) forName() method is available in java.lang package. forName()方法在java.lang包中可用。 forName() method is used to return the class object for the Class with the given class_name. forName()方法用于返回具有给…
setlenient日历类setLenient()方法 (Calendar Class setLenient() method) setLenient() method is available in java.util package. setLenient()方法在java.util包中可用。 setLenient() method is used to set or unset lenient status of date or time interpretations. s…
有时,希望除去某些记录或更改它们的内容。DELETE 和 UPDATE 语句令我们能做到这一点。用update修改记录UPDATE tbl_name SET 要更改的列WHERE 要更新的记录这里的 WHERE 子句是可选的,因此如果不指定的话,表中的每个记录都被更新。例如&#…
小练习的题目:
1、读取一张图,分解RGB三个通道
/************练习1**********************/
int main()
{Mat img1 imread("D:\\opencv_picture_test\\miku2.jpg",2|4); //灰度图if (img1.empty()){printf("Could not find the imag…
1.改变图片大小 -(UIImage*)imageWithImage:(UIImage*)image scaledToSize:(CGSize)newSize
{// Create a graphics image contextUIGraphicsBeginImageContext(newSize);// Tell the old image to draw in this new context, with the desired// new size[image drawInRect:CG…
BufferedReader类skip()方法 (BufferedReader Class skip() method) skip() method is available in java.io package. skip()方法在java.io包中可用。 skip() method is used to skip the given number of bytes of characters (n_bytes_of_char) from this BufferedReader. s…
1、将Master和Slave服务器都设置为read-onlymysql>SET global.read_onlyON;2、将Master与Slave服务器都停下来service mysql stop3、开启GTIDs开启GTIDs需要在master和slave服务器上都配置gtid-mode,log-bin,log-slave-updates,enforce-gtid-consistency(在MySQL 5.6.9之前是…